FRESH-WATER FISHES OF SIAM, OR THAILAND 



217 



nor abundant. Definite locality records are for the Menani Chao 

 Phya and the Meklong. The British Museum contains several speci- 

 mens from the Menam Chao Phya received from the Siamese Museum. 

 (Jne of a lot collected at Angtong, on the Menam Chao Phya, in No- 

 vember 1923, was compared with Bleekerian material by Dr. de Beau- 

 fort and found to agree. 



Figure 38. — OsUochilm schlegeli (Bleeker). Drawn by Nal Chote Suvatti; courtesy 

 of the Thailand Government. 



A fish, 15 cm. long, from the Meklong at Ban Pong, in December 

 1925, had 18 scales around the narrowest part of the caudal peduncle ; 

 the normal number is 20. 



OSTEOCHILUS TATUMI Fowler 



Osieochilus tatiimi Fowler, 1937, p. 180, figs. 118, 119 (Bangkok). 



Only the type, ll.T cm. long, from the Menam Chao Phya at Bang- 

 kok, is known. The species is described as having only a maxillary 

 barbel, in this respect agreeing with O. ochncs. The barbel is 0.4 

 diameter of eye and does not appear in the figure of the whole fish but 

 shows in the view of the underside of the head. There are "at least 

 4 series of pores on the snout, evidently scars of pearl organs," to 

 quote the original description; in the figure three rows are repre- 

 sented on the snout and one row, of about six pores, on the upper lip. 



i OSTEOCHILUS OCHRUS Fowler 



OsteocMlus ochrus Fowleb, 1935a, p. 118, figs. 56, 57 (Bangkok) ; 1937, p. ISO 

 (Kemarat). 

 The species is peculiar in having only maxillary barbels, which are 

 very short and nearly concealed in the supralabial groove. The snout 

 is described as having "3 or 4 irregular close-set pearl organ scars," 

 but the fioure shows over 30 such scars on one side of the head. 



